hey Greg, im assuming the arms are adjustable to tighten the hold? on the itouch(4th gen)

Yup def and its nice n stiff! (tehehe) I romp my Jeep a ton and hard (again hehe) and it never moves. It's great and will adjust to any phone. It even goes landscape style for movies n shit! The only thing is, it blocks the passenger from their temp control but whatevs! haha